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        <listitem>
         <para>
+         Allow the optimizer to remove unnecessary references to left
+         outer join subqueries (David Rowley)
+        </para>
+       </listitem>
+ 
+       <listitem>
+        <para>
+         Allow pushdown of query restrictions into <link
+         linkend="functions-window">window functions</>, where appropriate
+         (David Rowley)
+        </para>
+       </listitem>
+ 
+       <listitem>
+        <para>
          Speed up <acronym>CRC</> (cyclic redundancy check) computations
          (Abhijit Menon-Sen, Heikki Linnakangas)
         </para>